Heating element control device and method

Abstract

The application relates to the field of heating control, in particular to a heating element control device and method. The heating element control device comprises: a power supply module comprising an alternating current power supply module and a direct current power supply module, which is used for supplying alternating current power and direct current power to the device; a zero-crossing detection circuit used for detecting the zero point of the alternating current power and sending a zero-crossing pulse signal to a control circuit; a controller used for sending a heating element opening signal to the control circuit when a heating task is performed; and the control circuit used for controlling the opening of a heating element according to the zero-crossing pulse signal and the heating element opening signal. According to the embodiment of the application, the control circuit is separately arranged, the control circuit is used for judging the zero-crossing pulse signal and the heating element opening signal, the same function of the controller controlling the closing of a silicon controlled switch is achieved, the frequency of the interruption of the controller is reduced, and the processing pressure of the controller is reduced.

Description

[Technical Field]

[0001] This application relates to the field of heating control, and more particularly to a heating element control device and method. [Background Technology]

[0002] When an image forming apparatus fixes an image on a medium, it requires high-temperature heating. Generally, the image forming apparatus applies alternating current to a heating element inside a heated roller, which heats the printing medium, melts the toner on the printing medium, and sets the toner.

[0003] Image forming apparatuses typically control the heating element using a silicon controlled rectifier (SCR) switch. In related technologies, the power supply zero point of the mains power is collected, sent to a controller for processing and judgment, and the processor selects the appropriate time to control the SCR switch to conduct, thus turning on the heating element.

[0004] However, excessive use of the processor to judge the zero-point pulse signal will cause the processor to consume too many resources, affecting the processor's processing efficiency. [Summary of the Invention]

[0005] In view of this, the purpose of the present invention is to provide a heating element control device and method, which uses a separate control circuit to receive high-level signals from the zero-crossing detection circuit and the controller, and uses AND logic to make a judgment. When the zero-crossing detection signal and the start signal are received simultaneously, the thyristor switch is closed to turn on the heating element, thereby reducing the processing pressure on the controller.

[0006] In a first aspect, embodiments of the present invention provide a heating element control device, comprising:

[0007] The power supply module includes an AC power supply module and a DC power supply module, used to supply AC power and DC power to the device;

[0008] The zero-crossing detection circuit is used to detect the zero point of the AC power supply and send a zero-crossing pulse signal to the control circuit.

[0009] A controller is used to send a heating element turn-on signal to the control circuit when performing a heating task;

[0010] The control circuit is used to control the heating element to turn on based on the zero-crossing pulse signal and the heating element turn-on signal.

[0011] Optionally, the zero-crossing detection circuit is connected between the AC power supply module and the control circuit;

[0012] The AC power supply module is at least used to supply power to the heating element;

[0013] The zero-crossing detection circuit is used to send the zero-crossing pulse signal to the control circuit when the AC power supply detects a zero-crossing point.

[0014] Optionally, the power module is equipped with a thyristor switch; the device further includes a thyristor drive circuit.

[0015] The DC power supply module is used to supply power to the thyristor switch at least; the output terminal of the control circuit is connected to the input terminal of the thyristor drive circuit.

[0016] The output terminal of the thyristor drive circuit is connected to the thyristor switch and is used to drive the thyristor switch to open or close according to the drive signal output by the control circuit.

[0017] The thyristor switch is connected to the AC power supply module. When the thyristor switch is closed, the AC power supply module supplies power to the heating element.

[0018] Optionally, the control circuit controls the heating element to turn on when both the zero-crossing pulse signal and the heating element turn-on signal are high-level signals.

[0019] Optionally, the control circuit includes at least a first transistor and a second transistor;

[0020] The base of the first transistor is connected to the output terminal of the controller to receive the heating element turn-on signal output by the controller, and the collector is connected to the base of the second transistor to output the turn-on signal to the second transistor.

[0021] The base of the second transistor is used to receive the heating element turn-on signal output by the first transistor, the emitter is connected to the output terminal of the zero-crossing detection circuit to receive the zero-crossing pulse signal, and the collector is connected to the thyristor control circuit to output a control signal to the thyristor control circuit when the heating element turn-on signal and the zero-crossing pulse signal are received.

[0022] Optionally, the heating element control device includes a power supply module and a control module;

[0023] The AC power supply, the zero-crossing detection circuit, and the thyristor control circuit are mounted on the power module.

[0024] The controller is mounted on the control module;

[0025] The control circuit is located on the control module, or on the power supply module.

[0026] Secondly, embodiments of the present invention provide a heating element control method, the method being applied to a control circuit, the method comprising:

[0027] Receive the zero-crossing pulse signal sent by the zero-crossing detection circuit;

[0028] Receive the start signal sent by the controller when the heating element is activated;

[0029] The heating element is controlled to turn on based on the zero-point pulse signal and the heating element turn-on signal.

[0030] Optionally, the zero-point pulse signal is sent by the zero-crossing detection circuit when the AC power supply is detected to have crossed zero.

[0031] The AC power source is at least the power source that supplies power to the heating element.

[0032] Optionally, controlling the heating element to turn on based on the zero-point pulse signal and the heating element turn-on signal includes:

[0033] When the zero-point pulse signal and the heating element turn-on signal are both high-level signals, a drive signal is sent to the thyristor drive circuit.

[0034] The driving signal is used to control the thyristor switch in the thyristor driving circuit to open or close.

[0035] When the thyristor switch is turned on, the heating element is turned on.

[0036] Thirdly, embodiments of the present invention provide a heating element control device, comprising:

[0037] At least one processor; and

[0038] At least one memory communicatively connected to the processor, wherein:

[0039] The memory stores program instructions that can be executed by the processor, which can invoke the program instructions to perform the method as described in any of the second aspects.

[0040] Fourthly, embodiments of the present invention provide a computer-readable storage medium comprising a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform any of the methods described in the second aspect.

[0041] The above scheme, by setting up a separate control circuit, achieves the same function as the controller controlling the closing of the thyristor switch, reducing the frequency of controller interruption and alleviating the processing pressure on the controller. [Attached Image Description]

[0042] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0043] Figure 1 This is a schematic diagram of a heating element control device provided in an embodiment of the present invention;

[0044] Figure 2 A schematic diagram of a control circuit provided in an embodiment of the present invention;

[0045] Figure 3 This is a schematic diagram of another heating element control device provided in an embodiment of the present invention;

[0046] Figure 4 A flowchart of a heating element control method provided in an embodiment of the present invention;

[0047] Figure 5 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention.

Detailed Implementation Methods

[0048] To better understand the technical solution of the present invention, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0049] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0050] Image forming apparatuses require high-temperature heating to fix the toner when transferring images onto printing media. Typically, an image forming apparatus directly applies AC power from an AC power supply module to a heating element, and a heated roller carrying the heating element heats the printing media to melt the toner and achieve toner adhesion. Image forming apparatuses are devices used to form images or text on imaging media, including but not limited to printers, copiers, fax machines, scanners, and multifunction printers that integrate printing, copying, faxing, and scanning functions.

[0051] In some embodiments, the switching on and off of the AC power supply is typically controlled by controlling the switching of a thyristor switch, thereby controlling the heating element when the AC power supply crosses zero. Specifically, to prevent interference from higher harmonics, reduce sudden interruptions in the current waveform, thereby reducing switching transient effects and improving system reliability, the thyristor switch is typically closed when the AC power supply crosses zero to enable the heating element to heat.

[0052] The main control method for the thyristor switch is as follows: the hardware structure on the image forming device, such as the power supply module, combined with the optocoupler, completes the acquisition of the zero-crossing pulse signal of the AC power supply and sends it to the controller. The controller detects the zero-crossing pulse signal and synchronously triggers the heating element to turn on the signal to control the heating element to start heating.

[0053] However, this control method requires the controller to be frequently interrupted to detect the zero-crossing pulse signal, which consumes a lot of controller resources and affects processing efficiency. It also requires high timeliness of the zero-crossing pulse signal.

[0054] To address the aforementioned issues, some embodiments employ a zero-crossing switch optocoupler to acquire the zero-crossing pulse signal. This method allows direct control of the SCR switch via the zero-crossing switch optocoupler, eliminating the need to send the zero-crossing pulse signal to a controller for processing. However, compared to ordinary optocouplers, the zero-crossing switch optocoupler is more expensive, and it can only control the SCR switch when the AC power supply crosses zero, failing to disconnect the SCR switch at non-zero points of the AC power supply. This results in less precise temperature control, which is detrimental to the high temperature control requirements of fixing heating.

[0055] If a non-zero-crossing thyristor with no heat loss is used as a thyristor switch, the high requirements for fixing heating control can be met. However, such thyristor devices are very expensive, which is not conducive to reducing production costs.

[0056] This invention provides a separate control circuit that receives signals from the zero-point detection circuit and the controller. The control circuit is designed as an AND gate logic circuit, so the heating element will only be activated when both the zero-point detection circuit and the controller send a high-level signal. This avoids frequent interruptions of the controller and reduces production costs.

[0057] This invention provides a heating element control device, such as... Figure 1As shown, the heating element control device includes a power supply module 110 and a control module 120. The power supply module 110 is equipped with a power supply module 111, and the AC power supply module 1111 in the power supply module 111 can be used to supply power to the heating element. The control module 120 is used to control the heating element control device and output a drive signal at an appropriate time to drive the AC power supply in the power supply module 110 to conduct.

[0058] The power supply module 110 specifically includes an AC power supply module 111, a zero-crossing detection circuit 112, and a thyristor control circuit 113. The power supply module 111 specifically includes an AC power supply module 1111 and a DC power supply module 1112. The control module 120 specifically includes a controller 121 and a control circuit 122.

[0059] The AC power supply module 1111 is used to supply power to the heating element connected to it. The AC power supply module also contains a SCR switch, which controls the on / off state of the AC power input to the heating element by opening and closing the SCR switch. When the SCR switch is closed, AC power is supplied to the heating element, and the heating element turns on to heat. Generally, the AC power output of the AC power supply module 111 is AC 220V mains power, and the heating element is a fuser halogen lamp or a piezoelectric ceramic plate.

[0060] The DC power supply module 1112 is used to supply power to the thyristor switch at least to control the opening and closing of the thyristor switch.

[0061] The input terminal of the zero-crossing detection circuit 112 is connected to the AC power supply module 112 to detect the AC power supply and output a high-level zero-crossing pulse signal when the AC power supply crosses zero. The zero-crossing detection circuit 112 sends the zero-crossing pulse signal to the control circuit 122 connected to its output terminal.

[0062] The zero-crossing detection circuit 112 includes at least an optocoupler, which can be used to detect the zero point of the AC power supply and transmit the signal to the control circuit 122 when the zero-crossing signal of the AC power supply is detected.

[0063] The output of controller 121 is connected to control circuit 122 and is used to send a high-level heating element turn-on signal to control the heating element to turn on heating when performing a heating task.

[0064] The input terminals of the control circuit 122 are connected to the output terminals of the zero-crossing detection circuit 112 and the controller 121, respectively, to receive the zero-crossing pulse signal sent by the zero-crossing detection circuit 112 and the heating element turn-on signal sent by the controller 121. The control circuit 122 performs logical judgment on the zero-crossing pulse signal and the heating element turn-on signal. When the zero-crossing pulse signal and the heating element turn-on signal form an "AND" logic, that is, when both a high-level zero-crossing pulse signal and the heating element turn-on signal are received simultaneously, the control circuit 122 controls the heating element to turn on.

[0065] Specifically, when the control circuit 122 controls the heating element to turn on, it needs to send a high-level drive signal to the thyristor control circuit 113 to further control the heating element through the thyristor control circuit.

[0066] The input terminal of the thyristor control circuit 113 is connected to the control circuit to receive the drive signal output by the control circuit, and drives the thyristor switch to close when the drive signal is received. The thyristor switch is connected to the AC power supply module 112. After the thyristor switch is closed, the AC power is turned on, and the component starts heating.

[0067] like Figure 2 As shown, this is an embodiment of the present invention. Figure 1 The diagram below shows a specific structure of a control circuit 103. The main body of the control circuit consists of a first transistor and a second transistor, and the input-output relationship between the two transistors forms an AND gate logic relationship. Several resistors are also connected within the control circuit for circuit protection.

[0068] The first transistor is connected between the controller and the second transistor to receive a high-level control signal sent by the controller. When a high-level control signal is received, the connection with the second transistor is established, and the control signal is sent to the second transistor. When no high-level signal is received, the connection with the second transistor cannot be established.

[0069] The input terminal of the second transistor is connected to the zero-crossing detection circuit and the output terminal of the first transistor, respectively. When the second transistor receives a high-level zero-crossing pulse signal sent by the zero-crossing detection circuit and receives the heating element turn-on signal of the first transistor, it outputs a high-level drive signal through its output terminal to the thyristor drive circuit.

[0070] In some embodiments, a transistor is used as the first transistor and the second transistor to achieve the above-described function.

[0071] The base of the first transistor is connected to the controller as its input terminal, receiving the heating element turn-on signal sent by the controller. When a high-level heating element turn-on signal is received, the heating element turn-on signal is output to the second transistor through its collector.

[0072] The base of the second transistor serves as its input terminal, connected to the collector of the first transistor, and receives the heating element activation signal from the first transistor. The emitter of the second transistor also serves as its input terminal, connected to the zero-crossing detection circuit, and receives the zero-crossing pulse signal from the circuit. When the second transistor receives both the high-level heating element activation signal and the high-level zero-crossing pulse signal, it outputs a high-level drive signal through its collector to the thyristor drive circuit, controlling the thyristor switch to turn on, thus activating the heating element.

[0073] In some embodiments, such as Figure 3 As shown, the control circuit 122 can also be directly installed in the power supply module 110, so as to be directly connected to the zero-crossing detection circuit on the power supply module. In this way, one signal conversion can be reduced in the process of the zero-crossing control circuit sending the zero-crossing pulse signal to the control circuit, that is, one optocoupler can be removed from the zero-crossing detection circuit, thereby further reducing production costs.

[0074] Combination Figure 1 The heating element control device shown, and Figure 2 The aforementioned control circuit, in this embodiment of the invention, also provides a heating element control method, which is applied to the control circuit, such as... Figure 4 As shown, the specific steps of this method include:

[0075] S401 receives the zero-crossing pulse signal sent by the zero-crossing detection circuit.

[0076] Specifically, the zero-crossing detection circuit detects the AC power supply and sends a zero-crossing pulse signal to the control circuit when the AC power supply crosses the zero point.

[0077] The control circuit receives the zero-crossing pulse signal through its internally mounted second transistor.

[0078] S402 receives the heating element turn-on signal sent by the controller when performing a heating task.

[0079] Specifically, when the image forming apparatus performs the task of heating and fixing toner on the printing medium, it sends a signal to turn on the heating element through the controller.

[0080] The control circuit receives the heating element activation signal through its internally mounted first transistor.

[0081] S403 controls the heating element to turn on based on the zero-point pulse signal and the heating element turn-on signal.

[0082] Specifically, when both the zero-point pulse signal and the heating element turn-on signal are received simultaneously, the control circuit outputs a drive signal to the thyristor drive circuit through the output terminal of the second transistor. This drives the thyristor control circuit to control the thyristor switch connected to the AC power supply to close, thus turning on the AC power supply and enabling the heating element to fix the toner on the printing medium.

[0083] Table 1 shows the logic truth table of the control circuit output drive signal provided in the embodiment of the present invention.

[0084]

[0085] Table 1. Logic Truth Table of Control Circuit Output Drive Signals

[0086] Referring to Table 1, at time 1, the control circuit does not receive the zero-crossing pulse signal output by the zero-crossing detection circuit, nor does it receive the heating element turn-on signal output by the controller. At this time, the control circuit does not output a drive signal, and the heating element does not turn on.

[0087] At time 2, the control circuit receives the heating element turn-on signal, but does not receive the zero-crossing pulse signal. At this time, the control circuit does not output a drive signal.

[0088] At time 3, the control circuit receives a zero-crossing pulse signal, but does not receive a heating element turn-on signal. At this time, the control circuit does not output a drive signal.

[0089] At time 4, the control circuit receives a zero-crossing pulse signal and simultaneously receives a heating element turn-on signal. At this time, the control circuit outputs a drive signal.

[0090] In this embodiment of the invention, a separate control circuit is provided. This control circuit receives high-level signals from the zero-crossing detection circuit and the controller, and uses AND logic to determine whether the heating element is activated. Only when both the zero-crossing detection signal and the heating element activation signal are received simultaneously will the thyristor switch be closed, activating the heating element. This achieves the same function as the controller controlling the thyristor switch, while simultaneously reducing the frequency of controller interruptions and alleviating the controller's processing load. Furthermore, it avoids using the expensive zero-crossing switch optocoupler and non-zero-crossing thyristors, thus reducing production costs.

[0091] Figure 5 This is a schematic diagram illustrating the structure of one embodiment of the electronic device described in this specification. The electronic device can be implemented as an image forming apparatus equipped with the heating element control device as described in the embodiments of the present invention. Figure 5As shown, the above-mentioned electronic device may include at least one processor; and at least one memory communicatively connected to the processing unit, wherein: the memory stores program instructions executable by the processing unit, and the processor can execute the image fixing method provided in this embodiment by calling the program instructions.

[0092] The aforementioned electronic device can be a device capable of intelligent dialogue with the user, and the specific form of the electronic device is not limited in the embodiments of this specification. It is understood that the electronic device here is the machine mentioned in the method embodiments.

[0093] Figure 5 A block diagram of an exemplary electronic device suitable for implementing embodiments of this specification is shown. Figure 5 The electronic device shown is merely an example and should not be construed as limiting the functionality and scope of use of the embodiments described in this specification.

[0094] like Figure 5 As shown, the electronic device is represented in the form of a general-purpose computing device. The components of the electronic device may include, but are not limited to: one or more processors 510, communication interface 520, memory 530, and communication bus 540 connecting different system components (including memory 530, communication interface 520 and processor 510).

[0095] The communication bus 540 represents one or more of several bus architectures, including a memory bus or memory controller, a peripheral bus, a graphics acceleration port, a processor, or a local bus using any of the various bus architectures. For example, these architectures include, but are not limited to, the Industry Standard Architecture (ISA) bus, the Micro Channel Architecture (MAC) bus, the Enhanced ISA bus, the Video Electronics Standards Association (VESA) local bus, and the Peripheral Component Interconnect (PCI) bus.

[0096] Electronic devices typically include a variety of computer-readable media. These media can be any available media that can be accessed by the electronic device, including volatile and non-volatile media, and removable and non-removable media.

[0097] Memory 530 may include computer system readable media in the form of volatile memory, such as random access memory (RAM) and / or cache memory. The electronic device may further include other removable / non-removable, volatile / non-volatile computer system storage media. Memory 530 may include at least one program product having a set (e.g., at least one) of program modules configured to perform the functions of the embodiments described herein.

[0098] A program / utility having a set (at least one) of program modules may be stored in memory 530. Such program modules include, but are not limited to, an operating system, one or more application programs, other program modules, and program data. Each or some combination of these examples may include an implementation of a network environment. The program modules typically perform the functions and / or methods described in the embodiments of this specification.

[0099] The processor 510 executes various functional applications and data processing by running programs stored in the memory 530, such as implementing the image fixation method provided in the embodiments shown in this specification.

[0100] This specification provides a non-transitory computer-readable storage medium that stores computer instructions that cause the computer to execute the image fixing method provided in the embodiments shown in this specification.

[0101] The aforementioned non-transitory computer-readable storage medium may be any combination of one or more computer-readable media. A computer-readable medium may be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of computer-readable storage media (a non-exhaustive list) include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), or flash memory, optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium may be any tangible medium containing or storing a program that may be used by or in connection with an instruction execution system, apparatus, or device.

[0102] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of sending, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0103] Program code contained on a computer-readable medium may be transmitted using any suitable medium, including but not limited to wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0104] Computer program code for performing the operations described herein can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or it can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0105] The foregoing has described specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are possible or may be advantageous.

[0106] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this specification, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0107] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this specification includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which the embodiments of this specification pertain.

[0108] Depending on the context, the word "if" as used here can be interpreted as "when," "when," "in response to determination," or "in response to detection." Similarly, depending on the context, the phrase "if determination" or "if detection (of the stated condition or event)" can be interpreted as "when determination," "in response to determination," "when detection (of the stated condition or event)," or "in response to detection (of the stated condition or event)."

[0109] It should be noted that the terminals involved in the embodiments of this specification may include, but are not limited to, personal computers (hereinafter referred to as PCs), personal digital assistants (hereinafter referred to as PDAs), wireless handheld devices, tablet computers, mobile phones, MP3 players, MP4 players, etc.

[0110] In the embodiments provided in this specification, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0111] Furthermore, the functional units in the various embodiments of this specification can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in a combination of hardware and software functional units.

[0112] The integrated units implemented as software functional units described above can be stored in a computer-readable storage medium. These software functional units, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods described in the various embodiments of this specification.

[0113] The above description is merely a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of protection of this specification.

Claims

1. A heating element control device, characterized in that, include: The power supply module includes an AC power supply module and a DC power supply module, used to supply AC power and DC power to the heating element control device; The zero-crossing detection circuit is used to detect the zero point of the AC power supply and send a zero-crossing pulse signal to the control circuit. A controller is used to send a heating element turn-on signal to the control circuit when performing a heating task; A control circuit is used to control the heating element to turn on based on the zero-crossing pulse signal and the heating element turn-on signal; The heating element control device also includes a power module, and the power module is equipped with a silicon controlled rectifier switch. The heating element control device further includes: a thyristor control circuit; The power supply module, the zero-crossing detection circuit, and the thyristor control circuit are disposed on the power supply module; The DC power supply module is at least used to supply power to the thyristor switch; The output terminal of the control circuit is connected to the input terminal of the thyristor control circuit; The output terminal of the thyristor control circuit is connected to the thyristor switch and is used to control the opening or closing of the thyristor switch according to the drive signal output by the control circuit. The thyristor switch is connected to the AC power supply module. When the thyristor switch is closed, the AC power supply module supplies power to the heating element.

2. The heating element control device according to claim 1, characterized in that, The zero-crossing detection circuit is connected between the AC power supply module and the control circuit; The AC power supply module is at least used to supply power to the heating element; The zero-crossing detection circuit is used to send the zero-crossing pulse signal to the control circuit when the AC power supply detects a zero-crossing point.

3. The heating element control device according to claim 1, characterized in that, The control circuit controls the heating element to turn on when both the zero-crossing pulse signal and the turn-on signal are high-level signals.

4. The heating element control device according to claim 1, characterized in that, The control circuit includes at least a first transistor and a second transistor; The base of the first transistor is connected to the output terminal of the controller to receive the heating element turn-on signal output by the controller, and the collector is connected to the base of the second transistor to output the heating element turn-on signal to the second transistor. The base of the second transistor is used to receive the heating element turn-on signal output by the first transistor, the emitter is connected to the output terminal of the zero-crossing detection circuit to receive the zero-crossing pulse signal, and the collector is connected to the thyristor control circuit to output a control signal to the thyristor control circuit when the turn-on signal and the zero-crossing pulse signal are received.

5. The heating element control device according to any one of claims 1-4, characterized in that, The heating element control device includes a control module; The controller is mounted on the control module; The control circuit is located on the control module, or on the power supply module.

6. A method for controlling a heating element, characterized in that, The method is applied to a control circuit, and the method includes: Receive the zero-crossing pulse signal sent by the zero-crossing detection circuit; Receive the heating element turn-on signal sent by the controller when performing a heating task; The heating element is controlled to turn on based on the zero-point pulse signal and the heating element turn-on signal; The heating element is turned on by a thyristor switch and a thyristor control circuit. The thyristor switch is powered by a DC power supply module; The output terminal of the control circuit is connected to the input terminal of the thyristor control circuit; The output terminal of the thyristor control circuit is connected to the thyristor switch and is used to control the opening or closing of the thyristor switch according to the drive signal output by the control circuit. The thyristor switch is connected to the AC power supply module. When the thyristor switch is closed, the AC power supply module supplies power to the heating element.

7. The method according to claim 6, characterized in that, The zero-point pulse signal is sent by the zero-crossing detection circuit when it detects that the AC power supply has crossed zero. The AC power source is at least for supplying power to the heating element.

8. The method according to claim 6, characterized in that, The step of controlling the heating element to turn on based on the zero-point pulse signal and the heating element turn-on signal includes: When the zero-point pulse signal and the heating element turn-on signal are both high-level signals, a drive signal is sent to the thyristor control circuit. The drive signal is used to control the thyristor switch in the thyristor control circuit to open or close. When the thyristor switch is closed, the heating element is turned on.

9. A heating element control device, characterized in that, include: At least one processor; as well as At least one memory communicatively connected to the processor, wherein: The memory stores program instructions that can be executed by the processor, which can invoke the program instructions to perform the method as described in any one of claims 6 to 8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device on which the computer-readable storage medium is located to perform the method of any one of claims 6 to 8.

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